Finding the Fourth Proportional to 8,429.18, 12,619.28 and 4,908.45

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.18 : 12,619.28 = 4,908.45 : x
2. Step 2: Convert to fraction form
   8,429.18/12,619.28 = 4,908.45/x
3. Step 3: Cross multiply
   8,429.18x = 12,619.28 × 4,908.45
4. Step 4: Simplify right side
   8,429.18x = 61,941,080.37
5. Step 5: Solve for x
   x = 61,941,080.37/8,429.18
6. Step 6: Final answer
   x = 7,348.42